230405639 has 2 divisors, whose sum is σ = 230405640. Its totient is φ = 230405638.

The previous prime is 230405611. The next prime is 230405717. The reversal of 230405639 is 936504032.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230405639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230405339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115202819 + 115202820.

It is an arithmetic number, because the mean of its divisors is an integer number (115202820).

Almost surely, 2^230405639 is an apocalyptic number.

230405639 is a deficient number, since it is larger than the sum of its proper divisors (1).

230405639 is an equidigital number, since it uses as much as digits as its factorization.

230405639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 230405639 is about 15179.1185185438. The cubic root of 230405639 is about 613.0525472848.

The spelling of 230405639 in words is "two hundred thirty million, four hundred five thousand, six hundred thirty-nine".